This experiment determined the ID 50 and ID 10 of the height o f rice seedling in the stage of one leaf and one heart by using the mixture of bensulfuron methyl and metsulfuron methyl.Their CTC was also studied.The results show that the CTC exceeds 100 except for five mixtures such as bensulfuron methyl 4.8×10 -3 g/m 2+ metsulfuron methyl 19.2×10 -3 g/m 2,expecially the mixtures of bensulfuron methyl 38.4×10 -3 g/m 2+ metsulfuron methyl 12.4×10 -3 g/m 2 and bensulfuron methyl 19.2×10 -3 g/m 2+ metsulfuron methyl 2.4×10 -3 g/...